Also it seems to be a good energy storage…for cases where you have irregular energy production. Create hydrogen via electrolysis using the energy surplus from wind, photovoltaic etc.
And if you need the power, you get it back via fuel cells.

I think I saw a documentary about the shetland islands, where they have (or had) a power surplus from wind farms mich grater than they where able to transfer to the main land.

I guess these are the cases which make sense…but creating another supply network to bring the hydrogen fuel everywhere might not be the way to go…